author | William Roberts <williamr@symbian.org> |
Tue, 13 Jul 2010 17:02:10 +0100 | |
changeset 113 | f3c3c510a760 |
parent 0 | 5d03bc08d59c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the License "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Camera implementation |
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* |
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*/ |
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|
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|
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/*! |
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* \internal |
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* \file |
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* \brief Camera implementation |
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*/ |
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|
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#ifndef M3G_CORE_INCLUDE |
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# error included by m3g_core.c; do not compile separately. |
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#endif |
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|
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#include "m3g_camera.h" |
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|
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/* Internal frustum plane enumeration (and testing order!) */ |
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|
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#define NEAR_PLANE 0 |
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#define FAR_PLANE 1 |
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#define LEFT_PLANE 2 |
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#define RIGHT_PLANE 3 |
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#define BOTTOM_PLANE 4 |
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#define TOP_PLANE 5 |
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|
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/*---------------------------------------------------------------------- |
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* Private functions |
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*--------------------------------------------------------------------*/ |
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/*! |
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* \internal |
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* \brief Makes sure that the internal projection matrix is up-to-date |
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* and checks if the camera has a zero view volume. |
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*/ |
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static void m3gValidateProjectionMatrix(Camera *camera) |
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{ |
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M3Gint projType = camera->projType; |
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/* The generic matrix is always valid, but for perspective and |
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* parallel we must regenerate the matrix */ |
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if (projType != M3G_GENERIC) { |
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M3Gfloat m[16]; |
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M3Gfloat clipNear = camera->clipNear; |
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M3Gfloat clipFar = camera->clipFar; |
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if (projType == M3G_PERSPECTIVE) { |
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M3Gfloat height = m3gTan(m3gMul(M3G_DEG2RAD * 0.5f, |
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camera->heightFov)); |
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m[0] = m3gRcp(m3gMul(camera->aspect, height)); |
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m[1] = m[2] = m[3] = 0.f; |
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m[4] = 0.f; |
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m[5] = m3gRcp(height); |
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m[6] = m[7] = 0.f; |
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m[8] = m[9] = 0.f; |
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m[10] = m3gDiv(-m3gAdd(clipFar, clipNear), |
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m3gSub(clipFar, clipNear)); |
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m[11] = -1.f; |
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m[12] = m[13] = 0.f; |
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m[14] = m3gDiv(m3gMul(m3gMul(-2.f, clipFar), clipNear), |
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m3gSub(clipFar, clipNear)); |
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m[15] = 0.f; |
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} |
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else if (projType == M3G_PARALLEL) { |
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M3Gfloat height = camera->heightFov; |
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m[0] = m3gDiv(2.f, m3gMul(camera->aspect, height)); |
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m[1] = m[2] = m[3] = 0.f; |
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m[4] = 0.f; |
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m[5] = m3gDiv(2.f, height); |
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m[6] = m[7] = 0; |
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m[8] = m[9] = 0; |
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m[10] = m3gDiv(-2.f, m3gSub(clipFar, clipNear)); |
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m[11] = 0.f; |
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m[12] = m[13] = 0.f; |
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m[14] = m3gDiv(-m3gAdd(clipFar, clipNear), |
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m3gSub(clipFar, clipNear)); |
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m[15] = 1.f; |
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} |
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else { |
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M3G_ASSERT(M3G_FALSE); /* unknown projection type! */ |
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} |
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m3gSetMatrixColumns(&camera->projMatrix, m); |
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} |
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109 |
|
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110 |
{ |
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M3GMatrix im; |
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if (!m3gMatrixInverse(&im, &camera->projMatrix)) { |
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camera->zeroViewVolume = M3G_TRUE; |
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} |
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else { |
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camera->zeroViewVolume = M3G_FALSE; |
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} |
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} |
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119 |
|
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camera->frustumPlanesValid = M3G_FALSE; |
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} |
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122 |
|
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123 |
/*! |
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* \internal |
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* \brief Validates the cached view frustum planes |
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*/ |
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static void m3gValidateFrustumPlanes(Camera *camera) |
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128 |
{ |
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if (!camera->frustumPlanesValid) { |
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Vec4 *plane; |
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Vec4 rows[4]; |
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132 |
|
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m3gGetMatrixRows(&camera->projMatrix, (M3Gfloat*) rows); |
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134 |
|
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plane = &camera->frustumPlanes[LEFT_PLANE]; |
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*plane = rows[3]; |
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m3gAddVec4(plane, &rows[0]); |
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138 |
|
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plane = &camera->frustumPlanes[RIGHT_PLANE]; |
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*plane = rows[3]; |
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m3gSubVec4(plane, &rows[0]); |
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142 |
|
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plane = &camera->frustumPlanes[BOTTOM_PLANE]; |
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*plane = rows[3]; |
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m3gAddVec4(plane, &rows[1]); |
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146 |
|
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plane = &camera->frustumPlanes[TOP_PLANE]; |
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*plane = rows[3]; |
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m3gSubVec4(plane, &rows[1]); |
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150 |
|
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plane = &camera->frustumPlanes[NEAR_PLANE]; |
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*plane = rows[3]; |
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m3gAddVec4(plane, &rows[2]); |
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154 |
|
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plane = &camera->frustumPlanes[FAR_PLANE]; |
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*plane = rows[3]; |
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m3gSubVec4(plane, &rows[2]); |
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158 |
|
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camera->frustumPlanesValid = M3G_TRUE; |
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} |
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161 |
} |
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162 |
|
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#undef NEAR_PLANE |
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#undef FAR_PLANE |
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#undef LEFT_PLANE |
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#undef RIGHT_PLANE |
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#undef BOTTOM_PLANE |
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#undef TOP_PLANE |
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169 |
|
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170 |
/*---------------------------------------------------------------------- |
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* Internal functions |
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*--------------------------------------------------------------------*/ |
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173 |
|
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174 |
/*! |
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* \internal |
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* \brief Overloaded Object3D method. |
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* |
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* \param property animation property |
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* \retval M3G_TRUE property supported |
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* \retval M3G_FALSE property not supported |
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*/ |
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static M3Gbool m3gCameraIsCompatible(M3Gint property) |
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183 |
{ |
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switch (property) { |
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case M3G_ANIM_FAR_DISTANCE: |
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case M3G_ANIM_FIELD_OF_VIEW: |
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case M3G_ANIM_NEAR_DISTANCE: |
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return M3G_TRUE; |
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189 |
default: |
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return m3gNodeIsCompatible(property); |
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} |
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192 |
} |
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193 |
|
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194 |
/*! |
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* \internal |
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* \brief Overloaded Object3D method. |
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* |
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* \param obj Camera object |
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* \param property animation property |
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* \param valueSize size of value array |
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* \param value value array |
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*/ |
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static void m3gCameraUpdateProperty(Object *obj, |
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M3Gint property, |
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M3Gint valueSize, |
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const M3Gfloat *value) |
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{ |
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Camera *camera = (Camera *) obj; |
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M3G_VALIDATE_OBJECT(camera); |
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M3G_ASSERT_PTR(value); |
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211 |
|
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switch (property) { |
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case M3G_ANIM_FAR_DISTANCE: |
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M3G_ASSERT(valueSize >= 1); |
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camera->clipFar = (camera->projType == M3G_PERSPECTIVE) |
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? m3gClampFloatPositive(value[0]) |
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: value[0]; |
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break; |
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case M3G_ANIM_FIELD_OF_VIEW: |
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M3G_ASSERT(valueSize >= 1); |
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camera->heightFov = (camera->projType == M3G_PERSPECTIVE) |
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? m3gClampFloat(value[0], 0.f, 180.f) |
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: m3gClampFloatPositive(value[0]); |
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break; |
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case M3G_ANIM_NEAR_DISTANCE: |
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M3G_ASSERT(valueSize >= 1); |
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camera->clipNear = (camera->projType == M3G_PERSPECTIVE) |
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? m3gClampFloatPositive(value[0]) |
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: value[0]; |
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break; |
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231 |
default: |
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m3gNodeUpdateProperty(obj, property, valueSize, value); |
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return; /* don't invalidate the matrix */ |
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} |
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235 |
|
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/* Validate the projection matrix if we changed any of the |
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* camera parameters */ |
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238 |
|
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m3gValidateProjectionMatrix(camera); |
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} |
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241 |
|
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242 |
/*! |
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* \internal |
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* \brief Overloaded Node method. |
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* |
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* Start render setup scene traversal. |
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* |
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* \param node Camera object |
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* \param toCamera transform to camera |
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* \param alphaFactor total alpha factor |
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* \param caller caller node |
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* \param renderQueue RenderQueue |
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* |
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* \retval M3G_TRUE continue render setup |
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* \retval M3G_FALSE abort render setup |
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*/ |
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static M3Gbool m3gCameraSetupRender(Node *self, |
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const Node *caller, |
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SetupRenderState *s, |
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RenderQueue *renderQueue) |
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{ |
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Node *parent; |
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M3Gbool success = M3G_TRUE; |
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264 |
|
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/* Just do the parent node. Note that we won't be needing the old |
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* state back after going up the tree, so we can overwrite it. */ |
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267 |
|
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parent = self->parent; |
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|
269 |
|
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if (caller != parent && parent != NULL) { |
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Matrix t; |
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272 |
|
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M3G_BEGIN_PROFILE(M3G_INTERFACE(self), M3G_PROFILE_SETUP_TRANSFORMS); |
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if (!m3gGetInverseNodeTransform(self, &t)) { |
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return M3G_FALSE; |
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} |
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m3gMulMatrix(&s->toCamera, &t); |
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M3G_END_PROFILE(M3G_INTERFACE(self), M3G_PROFILE_SETUP_TRANSFORMS); |
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279 |
|
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/* The parent node will update the alpha factor and culling |
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* mask if necessary, so we need not touch those */ |
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282 |
|
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success = M3G_VFUNC(Node, parent, setupRender)(parent, |
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self, s, renderQueue); |
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285 |
} |
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286 |
|
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return success; |
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} |
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289 |
|
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290 |
/*! |
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* \internal |
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* \brief Overloaded Object3D method. |
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293 |
* |
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* \param originalObj original Camera object |
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* \param cloneObj pointer to cloned Camera object |
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* \param pairs array for all object-duplicate pairs |
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* \param numPairs number of pairs |
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*/ |
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static M3Gbool m3gCameraDuplicate(const Object *originalObj, |
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Object **cloneObj, |
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Object **pairs, |
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M3Gint *numPairs) |
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303 |
{ |
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Camera *original = (Camera *)originalObj; |
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Camera *clone = (Camera *)m3gCreateCamera(originalObj->interface); |
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*cloneObj = (Object *)clone; |
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if (*cloneObj == NULL) { |
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return M3G_FALSE; |
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309 |
} |
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310 |
|
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|
311 |
if (m3gNodeDuplicate(originalObj, cloneObj, pairs, numPairs)) { |
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clone->projType = original->projType; |
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clone->projMatrix = original->projMatrix; |
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clone->heightFov = original->heightFov; |
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clone->aspect = original->aspect; |
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clone->clipNear = original->clipNear; |
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clone->clipFar = original->clipFar; |
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clone->zeroViewVolume = original->zeroViewVolume; |
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return M3G_TRUE; |
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320 |
} |
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321 |
else { |
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return M3G_FALSE; |
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323 |
} |
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324 |
} |
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325 |
|
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326 |
/*! |
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327 |
* \internal |
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* \brief Initializes a Camera object. See specification |
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* for default values. |
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330 |
* |
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* \param m3g M3G interface |
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* \param camera Camera object |
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333 |
*/ |
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334 |
static void m3gInitCamera(Interface *m3g, Camera *camera) |
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335 |
{ |
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M3GMatrix m; |
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|
337 |
|
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338 |
/* Camera is derived from node */ |
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m3gInitNode(m3g, &camera->node, M3G_CLASS_CAMERA); |
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340 |
|
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341 |
/* GENERIC, Identity */ |
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m3gIdentityMatrix(&m); |
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m3gSetProjectionMatrix(camera, (const M3GMatrix *)&m); |
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344 |
} |
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|
345 |
|
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346 |
/*! |
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347 |
* \internal |
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348 |
* \brief Sets camera matrix to OpenGL |
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349 |
* projection matrix. |
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350 |
* |
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351 |
* \param camera Camera object |
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352 |
*/ |
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353 |
static void m3gApplyProjection(const Camera *camera) |
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354 |
{ |
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355 |
M3Gfloat t[16]; |
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356 |
|
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m3gGetMatrixColumns(&camera->projMatrix, t); |
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358 |
|
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359 |
glMatrixMode(GL_PROJECTION); |
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glLoadMatrixf(t); |
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glMatrixMode(GL_MODELVIEW); |
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362 |
} |
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|
363 |
|
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364 |
/*! |
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|
365 |
* \internal |
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|
366 |
* \brief Returns a pointer to the camera projection matrix |
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|
367 |
* |
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368 |
* The matrix <em>must not</em> be accessed directly, as only this |
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369 |
* function will ensure that the returned matrix has valid values in |
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|
370 |
* it. |
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|
371 |
* |
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|
372 |
* \param camera Camera object |
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373 |
* \return a pointer to the projection matrix |
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374 |
*/ |
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375 |
static const Matrix *m3gProjectionMatrix(const Camera *camera) |
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376 |
{ |
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|
377 |
M3G_VALIDATE_OBJECT(camera); |
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|
378 |
|
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|
379 |
return &camera->projMatrix; |
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|
380 |
} |
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|
381 |
|
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|
382 |
/*! |
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|
383 |
* \internal |
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|
384 |
* \brief Retrieves a pointer to the six camera space view frustum planes |
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|
385 |
*/ |
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386 |
static const Vec4 *m3gFrustumPlanes(const Camera *camera) |
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|
387 |
{ |
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|
388 |
M3G_VALIDATE_OBJECT(camera); |
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|
389 |
m3gValidateFrustumPlanes((Camera*) camera); |
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|
390 |
return camera->frustumPlanes; |
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|
391 |
} |
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|
392 |
|
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|
393 |
/*---------------------------------------------------------------------- |
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|
394 |
* Virtual function table |
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|
395 |
*--------------------------------------------------------------------*/ |
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|
396 |
|
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|
397 |
static const NodeVFTable m3gvf_Camera = { |
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|
398 |
{ |
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|
399 |
{ |
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|
400 |
m3gObjectApplyAnimation, |
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|
401 |
m3gCameraIsCompatible, |
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|
402 |
m3gCameraUpdateProperty, |
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|
403 |
m3gObjectDoGetReferences, |
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|
404 |
m3gObjectFindID, |
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|
405 |
m3gCameraDuplicate, |
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|
406 |
m3gDestroyNode /* no extra clean-up for Camera */ |
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|
407 |
} |
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|
408 |
}, |
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|
409 |
m3gNodeAlign, |
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|
410 |
NULL, /* pure virtual DoRender */ |
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411 |
m3gNodeGetBBox, |
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412 |
m3gNodeRayIntersect, |
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413 |
m3gCameraSetupRender, |
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414 |
m3gNodeUpdateDuplicateReferences, |
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415 |
m3gNodeValidate |
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416 |
}; |
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|
417 |
|
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|
418 |
|
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|
419 |
/*---------------------------------------------------------------------- |
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|
420 |
* Public API functions |
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|
421 |
*--------------------------------------------------------------------*/ |
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|
422 |
|
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parents:
diff
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|
423 |
/*! |
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parents:
diff
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|
424 |
* \brief Creates a Camera object. |
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parents:
diff
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|
425 |
* |
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parents:
diff
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|
426 |
* \param interface M3G interface |
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parents:
diff
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|
427 |
* \retval Camera new Camera object |
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Revision: 201003
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parents:
diff
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|
428 |
* \retval NULL Camera creating failed |
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parents:
diff
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|
429 |
*/ |
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Revision: 201003
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parents:
diff
changeset
|
430 |
M3G_API M3GCamera m3gCreateCamera(M3GInterface interface) |
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Revision: 201003
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parents:
diff
changeset
|
431 |
{ |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
432 |
Interface *m3g = (Interface *) interface; |
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Revision: 201003
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parents:
diff
changeset
|
433 |
M3G_VALIDATE_INTERFACE(m3g); |
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parents:
diff
changeset
|
434 |
|
5d03bc08d59c
Revision: 201003
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parents:
diff
changeset
|
435 |
{ |
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Revision: 201003
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parents:
diff
changeset
|
436 |
Camera *camera = m3gAllocZ(m3g, sizeof(Camera)); |
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Revision: 201003
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parents:
diff
changeset
|
437 |
|
5d03bc08d59c
Revision: 201003
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parents:
diff
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|
438 |
if (camera != NULL) { |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
439 |
m3gInitCamera(m3g, camera); |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
440 |
} |
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Revision: 201003
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parents:
diff
changeset
|
441 |
|
5d03bc08d59c
Revision: 201003
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parents:
diff
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|
442 |
return (M3GCamera) camera; |
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Revision: 201003
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parents:
diff
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|
443 |
} |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
444 |
} |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
445 |
|
5d03bc08d59c
Revision: 201003
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parents:
diff
changeset
|
446 |
/*! |
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Revision: 201003
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parents:
diff
changeset
|
447 |
* \brief Sets a parallel projection. |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
448 |
* |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
449 |
* \param handle Camera object |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
450 |
* \param height height (=fovy) |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
451 |
* \param aspectRatio viewport aspect ratio |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
452 |
* \param clipNear near clipping plane |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
453 |
* \param clipFar far clipping plane |
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Revision: 201003
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parents:
diff
changeset
|
454 |
*/ |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
455 |
M3G_API void m3gSetParallel(M3GCamera handle, |
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Revision: 201003
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parents:
diff
changeset
|
456 |
M3Gfloat height, |
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Revision: 201003
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parents:
diff
changeset
|
457 |
M3Gfloat aspectRatio, |
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Revision: 201003
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parents:
diff
changeset
|
458 |
M3Gfloat clipNear, M3Gfloat clipFar) |
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Revision: 201003
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parents:
diff
changeset
|
459 |
{ |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
460 |
Camera *camera = (Camera *) handle; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
461 |
M3G_VALIDATE_OBJECT(camera); |
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Revision: 201003
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parents:
diff
changeset
|
462 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
463 |
if (height <= 0 || aspectRatio <= 0.0f) { |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
464 |
m3gRaiseError(M3G_INTERFACE(camera), M3G_INVALID_VALUE); |
5d03bc08d59c
Revision: 201003
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parents:
diff
changeset
|
465 |
return; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
466 |
} |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
467 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
468 |
camera->projType = M3G_PARALLEL; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
469 |
camera->heightFov = height; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
470 |
camera->aspect = aspectRatio; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
471 |
camera->clipNear = clipNear; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
472 |
camera->clipFar = clipFar; |
5d03bc08d59c
Revision: 201003
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parents:
diff
changeset
|
473 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
474 |
m3gValidateProjectionMatrix(camera); |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
475 |
} |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
476 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
477 |
/*! |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
478 |
* \brief Sets a perspective projection. |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
479 |
* |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
480 |
* \param handle Camera object |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
481 |
* \param fovy fovy |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
482 |
* \param aspectRatio viewport aspect ratio |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
483 |
* \param clipNear near clipping plane |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
484 |
* \param clipFar far clipping plane |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
485 |
*/ |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
486 |
M3G_API void m3gSetPerspective(M3GCamera handle, |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
487 |
M3Gfloat fovy, |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
488 |
M3Gfloat aspectRatio, |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
489 |
M3Gfloat clipNear, M3Gfloat clipFar) |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
490 |
{ |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
491 |
Camera *camera = (Camera *) handle; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
492 |
M3G_VALIDATE_OBJECT(camera); |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
493 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
494 |
if (fovy <= 0.0f || fovy >= 180.f |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
495 |
|| aspectRatio <= 0.0f |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
496 |
|| clipNear <= 0.0f || clipFar <= 0.0f) { |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
497 |
m3gRaiseError(M3G_INTERFACE(camera), M3G_INVALID_VALUE); |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
498 |
return; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
499 |
} |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
500 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
501 |
camera->projType = M3G_PERSPECTIVE; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
502 |
camera->heightFov = fovy; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
503 |
camera->aspect = aspectRatio; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
504 |
camera->clipNear = clipNear; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
505 |
camera->clipFar = clipFar; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
506 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
507 |
m3gValidateProjectionMatrix(camera); |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
508 |
} |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
509 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
510 |
/*! |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
511 |
* \brief Sets a generic projection. |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
512 |
* |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
513 |
* \param handle Camera object |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
514 |
* \param transform projection matrix |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
515 |
*/ |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
516 |
M3G_API void m3gSetProjectionMatrix(M3GCamera handle, |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
517 |
const M3GMatrix *transform) |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
518 |
{ |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
519 |
Camera *camera = (Camera *) handle; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
520 |
M3G_VALIDATE_OBJECT(camera); |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
521 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
522 |
if (transform == NULL) { |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
523 |
m3gRaiseError(M3G_INTERFACE(camera), M3G_NULL_POINTER); |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
524 |
return; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
525 |
} |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
526 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
527 |
camera->projType = M3G_GENERIC; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
528 |
m3gCopyMatrix(&camera->projMatrix, transform); |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
529 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
530 |
m3gValidateProjectionMatrix(camera); |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
531 |
} |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
532 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
533 |
/*! |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
534 |
* \brief Gets camera matrix. |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
535 |
* |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
536 |
* \param handle Camera object |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
537 |
* \param transform projection matrix to fill in |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
538 |
* \return projection type |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
539 |
*/ |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
540 |
M3G_API M3Gint m3gGetProjectionAsMatrix(M3GCamera handle, |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
541 |
M3GMatrix *transform) |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
542 |
{ |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
543 |
Camera *camera = (Camera *) handle; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
544 |
M3G_VALIDATE_OBJECT(camera); |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
545 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
546 |
if (transform != NULL) { |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
547 |
/* Check for impossible projection matrix */ |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
548 |
if (camera->projType != M3G_GENERIC && |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
549 |
camera->clipFar == camera->clipNear) { |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
550 |
m3gRaiseError(M3G_INTERFACE(camera), M3G_ARITHMETIC_ERROR); |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
551 |
return 0; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
552 |
} |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
553 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
554 |
m3gCopyMatrix(transform, m3gProjectionMatrix(camera)); |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
555 |
} |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
556 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
557 |
return camera->projType; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
558 |
} |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
559 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
560 |
/*! |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
561 |
* \brief Gets camera parameters. |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
562 |
* |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
563 |
* \param handle Camera object |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
564 |
* \param params camera parameters to fill in |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
565 |
* \return projection type |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
566 |
*/ |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
567 |
M3G_API M3Gint m3gGetProjectionAsParams(M3GCamera handle, M3Gfloat *params) |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
568 |
{ |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
569 |
Camera *camera = (Camera *) handle; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
570 |
M3G_VALIDATE_OBJECT(camera); |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
571 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
572 |
if (params != NULL && camera->projType != M3G_GENERIC) { |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
573 |
params[0] = camera->heightFov; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
574 |
params[1] = camera->aspect; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
575 |
params[2] = camera->clipNear; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
576 |
params[3] = camera->clipFar; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
577 |
} |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
578 |
|
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
579 |
return camera->projType; |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
580 |
} |
5d03bc08d59c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
581 |